the sky after a meteor slammed into russia today. it streaked across the sigh beeren why sky and -- siberian sky with the power of an atomic bomb. injuring thousands of people, mostly from broken glass. nasa says it was the size of a building and moving at 40,000 miles per hour. >> the recent occurrences is probably what makes it interesting. that's what has me up here. >> what do you know of asteroids? >> i know they can be dangerous. >> meanwhile, another asteroid is passing very close to the earth tonight. it is the closest any asteroid has ever gotten to the earth. stargazers came out to get a glimpse of a fuzzy dot on a video screen. 17,000 miles seems like a long distance, but the asteroid is so close to the earth that astronomers say the earth's gravity is bending its path. >> which means it has some potential, although not an immediate potential of hitting the earth. >> a lot of astronomical activity in the past 24 hours, but astronomers hearsay it is just a -- here say it is a wonderful coincidence. reporting live from the s